Chris Brown allegedly has a history of assaulting Rihanna. While TMZ cites the police report where Rihanna claims she’s been abused before, Us Weekly reports she had bruises on her neck as recently as December:

Brown — who is currently being investigated by Los Angeles county prosecutors after Rihanna allegedly accused him of assaulting her the night before the Grammys — always had a “volatile” relationship with the singer, an insider tells Us.
A Rihanna confidant adds that bruises were clearly visible on the singer’s neck in early December.
Alarmed, “I asked is everything was OK with her and Chris,” says the pal. “She told me, ‘We broke up again.’ I didn’t pursue the issue further.”

Meanwhile, T.I. and actor Terrence Howard have retracted statements they made. Both claim had they known what Chris Brown was accused of they would’ve never spoken, according to E! News:

When asked by paparazzi last night if he had any comment on the Chris Brown incident with Rihanna, the actor said, “It’s just life, man. Chris is a great guy. He’ll be all right. And Rihanna knows he loves her. She’ll be all right. Just everybody’s got to get out of their way.”
But now, Howard is insisting he didn’t know about the allegations made against Brown when he made his remarks.
“When they asked me about Chris Brown the other day, I was in no way aware of what he had been accused of,” Howard said in a statement. “Had I known, I would have never had said something so insensitive.”
Howard is the second high-profile celeb in as many days to retract remarks they made about Brown and Rihanna.
Rapper T.I. issued a statement yesterday regretting comments he made the night before on Last Call With Carson Daly. T.I. said he “made a mistake of commenting before understanding the situation.”

E! News also reports Chris Brown is hiding out in Vegas at the Hard Rock Hotel & Casino while waiting for the district attorney’s office to file charges, so at least he’s having fun. That’s probably the best thing he can do for his case right now. Short of going to Disneyland and punching Tinkerbell in the mouth.